Hypothecation

The hypothecation rules are the SEC's anti-misappropriation rules. They define the limits on what a firm can do with customer securities even when the customer has signed a generic "the firm may pledge my securities" provision in the margin agreement.

The rules constrain the liens and loans supported by customer property. They work alongside the customer-protection requirement governing fully paid and excess margin securities.

What Hypothecation Is

Hypothecation = pledging securities as collateral for a loan without transferring ownership. The firm holds the customer's stock (under the customer-protection possession-or-control discipline), and the firm uses that stock as collateral to borrow money from a bank or other lender. The customer remains the beneficial owner; the lender has a security interest until the firm repays the loan.

Here is one simplified example of how a firm might fund margin lending:

1. Customer buys $100,000 of stock with $50,000 of margin debt to the firm
2. Firm holds the stock under the customer protection rule (in DTC or similar)
3. Subject to the applicable consent and borrowing limits, the firm pledges no more than $70,000 of eligible margin securities for a $50,000 broker loan. It preserves possession or control of the remaining $30,000 of excess margin securities
4. Assume both $50,000 loan balances remain unchanged for one year, with annual simple interest of 8% charged to the customer and 5% paid to the bank. The $1,500 gross interest spread is before other costs and losses

The customer's signed margin agreement typically authorizes the hypothecation in advance. The hypothecation rules set the rules of the road for that hypothecation.

The Three Hypothecation Prohibitions

A BD may NOT hypothecate customer securities to do any of the following:

Customer-to-Customer Commingling: Consent Required

Under the ordinary rule, pooling Customer A's and Customer B's stock under one lien requires both customers' prior written consent. A properly scoped margin agreement may supply that consent. A later signature does not retroactively satisfy the prior-consent requirement. Consent does not waive the borrowing cap or independently satisfy custody safeguards.

Customer-to-Firm Commingling: Consent Is Insufficient

Under the ordinary rule, customer consent does not authorize a common lien on customer and firm securities. Specific exceptions, including qualifying same-day clearing-house liens, must be assessed on their own terms. The ordinary restriction addresses these risks:

• If customer and firm securities are pooled under one lien, the lender's claim on the pool blurs the line between firm assets and customer assets
• In a firm wind-down, the lender might be able to claim the entire pool, including the customer portion
• The rule limits that exposure by separating the liens

Borrowing Limit and Collateral Value

The ordinary cap compares the aggregate loans secured by customer securities with aggregate customer indebtedness. It is not a dollar-for-dollar ceiling on the market value of pledged stock. Separate custody safeguards generally require possession or control of customer securities above 140% of the customer's debit, as well as fully paid securities.

Here, aggregate customer indebtedness uses all customers' securities-account indebtedness, with the prescribed computation adjustments. Treat related guaranteed and guarantor accounts as one consolidated account. For accounts carrying both long and short positions, treat the market value needed to cover the shorts as a debit. Uncollected items do not reduce the amount. This differs from the firm's own aggregate indebtedness for net-capital purposes.

The borrowing cap is firm-wide. The rule sets no separate pledging cap for each customer.

What limits one customer's stock is the custody line. Securities worth more than 140% of that customer's debit are excess margin securities, and the firm keeps them in its possession or control. A customer with no debit has none of the stock pledged, even when other customers' debits leave the firm room under the firm-wide cap.

Example: A firm's total customer indebtedness is $120,000. Outside applicable exceptions, its aggregate borrowing secured by customer securities cannot exceed $120,000. The permissible collateral may have a different market value, subject to each customer's fully paid and excess-margin protections.

The rules contain specific same-day clearing-house lien exceptions. They also provide a narrowly timed cure when an excess arises from a reduction in customer indebtedness: act as promptly as practicable and within the stated next-banking-day limit, before obtaining or increasing another covered bank loan. These provisions are not a general permission to overborrow.

Exam Tip: Gotchas

• Customer consent alone does not waive the borrowing cap or permit customer-to-firm common liens.
• Distinguish loan amount, collateral value, and the 140% excess-margin threshold. They answer different questions.

The Pledgee Notice Requirement

Absent an applicable exception, at or before hypothecation the firm gives the lender written notice that the securities are carried for customers and that the hypothecation complies with the rule. The notice:

• Identifies the pledged securities as customer-owned, not firm-owned
• Certifies that the hypothecation does not contravene the rule
• Does not erase a valid lender lien or guarantee that customers outrank the lender in every insolvency

The notice supports transparent, compliant pledging. The rule contains an omnibus-account certification mechanism and excludes qualifying loans made and repaid on the same calendar day from this notice paragraph. Do not infer that the notice eliminates the lender's security interest.

Exam Tip: Gotchas

• Required lender notice and certification are independent duties. Customer consent does not replace them, and the notice does not guarantee priority in every default.

Exchange-Member vs. OTC Scope

The hypothecation framework actually comes from two parallel SEC rules, with overlapping but technically distinct scopes:

The bodies impose parallel safeguards with distinct scope language. Apply their actual firm coverage, customer definitions, and exceptions rather than treating execution venue alone as the scope test.

Exam Tip: Gotchas

• The exchange-related rule reaches exchange members and broker-dealers transacting securities business through them. The parallel body addresses broker-dealer hypothecation more generally. Both have defined customer scopes and specific exceptions; venue alone does not determine full coverage.

How the Hypothecation Rules Connect to the Customer-Protection Chain

Hypothecation rules sit between the customer protection rule (possession or control) and the customer-securities-lending requirement:

1. The customer protection rule ordinarily requires possession or control of fully paid and excess margin securities. A qualifying securities borrow has a separate agreement, collateral, and other conditions.
2. The hypothecation rules say the firm may hypothecate customer securities (at the boundary, the non-excess margin securities, that is, securities up to 140% of the debit balance), subject to the three prohibitions and the pledgee notice.
3. Customer-securities lending has separate branches. Lending eligible customer margin securities requires the customer's prior written authorization. Borrowing fully paid or excess margin securities invokes additional FINRA notice, customer-appropriateness, risk-disclosure, agreement, and collateral safeguards. Those additional borrowing safeguards do not apply to every ordinary margin-securities loan merely because customer securities are involved.

The three rules are layered: the customer protection rule sets the segregation; the hypothecation rules set the pledge limits; the customer-securities-lending requirement sets the lending limits. A firm that is clean on customer protection but violates the hypothecation rules has a separate violation; a firm that is clean on hypothecation but violates the customer-securities-lending requirement also has a separate violation.

What Should You Check on Exam Day?

• Can you distinguish which commingling prohibition customer consent overrides (customer-to-customer) from the one it never overrides (customer-to-firm)?
• Can you distinguish the aggregate borrowing ceiling from collateral market value?
• Can you identify the required notice and certification without assuming they erase the lender's lien?
• Can you apply the exchange-related rule to exchange members and broker-dealers transacting securities business through them, alongside the parallel body's customer definitions and exceptions?